ViewModels create and maintain vCurrent_ and vSelected_ variables for each level of your ViewModel-nestings. The values maintained by the Framework reflect what the user has focused on/clicked last (vCurrent_), and when you allow multi-select in grids, the vSelected_ collection is maintained. The variables are strongly typed to match your nestings and get the postfix name from the nesting.

See this article for a fuller discussion on how to cursor your ViewModel.

See also How to use vCurrent and “self” correctly in viewmodels